Adjustable valve-seat facer



F. HOERNER.

ADJUSTABLE VALVE SEATYFACER. APPLICATION FILED MAR. 1?, 1919.

'1 49, 15 8, Patented Aug: 10, 1923 56.8. Wm 4 Iv vmvrzmv j 1 N/fHOLWNER.

fro .s

FRANK HOEItNER, OF LOS ANGELES, CALIFORNIA.

ADJUSTABLE VALVE-SEAT FACER.

Specification of Letters Patent. l P t t 0, 1 2

Application filed March 17, 1919. Serial No. 283,205.

To all whom it may concern:

Be it known that I, FRANK HQ'ERNER, a citizen of the United States,residing at Los Angeles, in the county of Los Angeles'and State .ofCali'fornia, have invented new and useful Improvements in AdjustableValve- Seat Facers, of specification. I I I My object is to make anadjustable valve seat facer and my invention consists of the novelfeatures herein shown described and claimed. f

which the following is a Figure l is a fragmentary sectionof-aninternalcombustion engine showing an adjustable valve seat facerembodying the principles ofmy invention in use the facer being shown inelevation.

Fig. 2 is a view in elevation upon an .en-. larged scale of the facershown in F ig. 1, the upper and lowerends of the stems being broken awaytoeconomize space.

detail of the facer head Fig. 3 is a vertical diametrical sectional ithe view be ng taken upon the line 3 -3 of Fig. 1 and looking in thedirectioii indicated by the arrows.

Fig. 4 is a top Y direction. indicated by t e arrow 4 inFig/3.

Fig. 5 is a'diametri on the lines 55 of Figs. 2 and .6.

Fig. 6 is. a horizontal 6-6 of Fig. 5.

Fig. 7 is a view analogouspto F ig. 5 and taken on the lines 77 of/lfi'igs. 6 and 8.

Fig. 8 is a top plan view of Fig. 2.

Fig. 9 is a bottom plan view looking in the direction indicated by thearrow 9 in Fig. 2.

A facer head 1 is shown in detail in Fig. 3 and in Fig. 4 and the headis formed and machined from a solid circular piece of suit,- able steel.A base 2 is round in bottom and top plan and fiat in diametrical crosssection and has a screw threaded opening 3 extending upwardly from itslower faceand. a larger screw threaded opening 4 extending downwardlyfrom its upper face, said open ings 8 and 4 being in line.

A straight peripheral face 5 of the head is considerably Iargerthan theperipheral face of the base 2, there being an inclined face (3connecting the lower end of the face 5 to the upper end of a face 7 ofthe base 2.

Radial slots from the upper fiat face 9, the bottom of the slots formingthe upper face 10 of the base riphery 5,

upper end with the face 17, A ,19' extending upwardly and outwardly fromplan fiew looking in the the face 17, an inclined bearing face.r'parallel with al sectional detail-as section on the line; 1

8 are formed across the head 9 '2. The slots 8 are evenly spaced apartand preferably there are eight slots radiating from the'center. A bore.11 is formed downwardly from the face 9 concentric with the periphery 5and in line with the screw threads 3 and l and concentrictherewith,

' said boredlextending straight downwardly slightly beyond the loweredge of the peand there being an inclined face 12 extending downwardlyand inwardly from the lower end of the straight portion of the bore 11,and a straight face 13 eX- tending downwardly from the lower end of theface 12 through the face 10 of the base, said face 13 being slightlyoutside of the of the screw threads 4. n opening 14 is tapped downwardlyfrom the face 9 substantially at the center ofeach of the housings 15between the slots 8. F aoer cutters 16 are mounted in the slots 8. Eachcutter is made from a straight flat piece of suitable steel and has alower edgel7 resting upon the face 10 at the bottom of theslot,'a-straight face 18 parallel an inclined cutting face the face 19extending downwardly and inwardly from the face 18, and vertical faces21 and 22.

slightly higher than the housings 15, and the cutting face 19 extendsslightly beyond the face .6 of the head 1.

A clamping annu'laij. ring fits upon the faces 18 of the cutterslnnopposition to the face 10 of the base, and clamping screws 24 areinserted downwardly throughthe clamping plate 23' plate'23 in the formof an The cutters fit closely in the slots and are u into thetappedholes 14. The clamping plate 23 has radial slots 25 extending from itsinner edge so that each section of the clamping plate is free enough tooperate independently of the other sections when thescrews are operated.The slots 25 are directly above the cutters but are much narrower thanthe cutters so that any one cutter is controlled by two of the sections26 between the slots 25. a

An operating stem 27 has a wrench seat 28 upon its. upper end forreceiving a handle 29 or a bit stock brace or the iii-1e. I The extremelower end of the stem 27 is screwed into the threads and jammed outenough to hold during the operation of the tool. Screw threads 30 fitthe screw threads is screwed upwardly the only extending a shortdistance upon the stem. A. neck 31 is formed above the screw threads 30by' reducing the stem, and then screw threads 32 extend upwardly fromthe neck 31 a considerable distance. The stem 27 is reduced in sizeabove. the threads 32. An expanding head 33 is screwed upon the threads32 and has a beveled face 34 upon its lower end extending through theclamping ring 23 and engaging the beveled faces 20 upon the cutters sothat as the head 33 is screwed downwardly the cutters. are movedoutwardly and so that as the head 33 tters may be moved inwardly.

The inner end faces'21 of the cutters may pass into the spaces formed byreducing the stem to produce the neck .31. words, at the start thecutters may be set with their inner end faces 21' against thev neck 31.

A wrench seat 35 is formed upon the upper end of the head 33 formanipulating the head.

A pilot stem 36 has ascrew thread 37 upon its upper end to fit the screwthread 3 and a shoulder 38 below the screw thread to jam against, thelower face of the head 1. The pilot stem 36 is adapted to extenddownwardly through a valve opening 39 and fit in the valve stem bearing$0 so' as to center the facer relative to the 'valve seat to be facedwhile the tool is in operation.

The operation is obvious. -T he engine casing ll has a plugged opening&2 directly above a valve seat 4-3, and when it is desired to face thevalve seat 43 the plug is removed from the opening 42, a pilot stem 36is selected which will lit the bearing 40 and the selected stem isplaced in position by screw lng into the threads 3, then the tool isinserted downwardly through the opening 42 with the pilot stem 36 in thebearing 40, and the tool may be operated in various ways, as by thehandle 29 or a brace or the like.

The stems 36 are to be made up in sets so that a stem may be selected tofit the bearing 40 of the engine to be operated upon. for instance, onevalve stem bearing may be half an inch and. another five-cighths of aninch, etc.

Various changes may be made without departing from the spirit of myinvention as claimed.

I claim:

1. In a valve seat facer, a head formed with radial slots in its upperface, cutters slidable in said slots, said head being provided withscrew holes in its upper face between said slots, a'plate fitting on theupper face of said head, said plate being provided with a central openic and with radial slots extending from said pening, said plate be ingalso provided with screw holes between its slots adapted to registerwith the screw holes in said head, screws extending through In other,

the screw holes in said plate and screwing to force them outwardly, awrench seat on the upper end of said stem, and a pilot stem secured tosaid head adapted to fit in a-valve bearing.

2. In a valve seat -faeer,-a head formed with radial slots in'its upperface, cutters slidable in said slots, said head being pro vided withthreaded screwholes in its ,upper face between said slots, a' platefitting on the upper face of said head, said. plate being provided witha central opening and with screw holes adapted to register-With thescrew holes in said head, screws extending through the holes in saidplate and into the threaded holes in said head for holding said plate onsaid head over the upper edge of said' cutters, a stem extending throughthe central hole in said plate and secured in said head, an expandinghead mounted on the lower portion of 'said'stem for forcing said cuttersoutwardly, and a pilot stem-secured to the lower side of said head.

3. In a valve seat facer, a head formed with radial slots in its upperface, cutters slidable in said slots, said head being provided withscrew holes in its upper face he said central opening in said platesecured in said head, an expanding head mounted on said stem forengaging said cutters and forcing them outwardly, and a pilot stemsecured to the lower side of said head.

4. In a valve seat facer,,a head formed with radial'slots in..its upperface, cutters slidable in said slots, said head being provided withthreaded screw holes in its upper face between said slots, a platefitting on the upper. face of said head, said plate being provided witha central opening and with screw holes adapted to register with thescrew holes in said head, screws extending through the holes in saidplate and into the threaded holes in said head for holding said plate onsaid head over the upperedge of said cutters, a stem threaded at itslower end extending through said central opening in said plate andscrewing into said head, an expanding head mounted on said stem forengaging and forcing said cutters outwardly,

and a pilot stein secured to the lowei! side 6. In a valve seat facet, ahead formed 15 of said head. with radial slots in its upper face,cutters 5. In a valve seat facer, a head formed 'slidabl'e. in saidslots, means removably fas- With radial slots in its upper face, cutterstened-to the upper face of said head to hold slidahle in said slotsmeans fastened in the said cutters in said slots, a stem secured inupper face of said :head for independently said head, an expanding headvertically 20 clamping the cutters in said slots, said means movable onsaid stem for engaging said cutheing provided with an opening, a stemsetel-s and forcing them outwardly, and a cured in said head andextending through pilot stem secured in said head to fit in a saidopening, a vertically movable expandvalve bearing. ing head mountedon'said'stem for engaging In testimony whereof I have signed my 25 saidcutters and forcing them outwardl name to this specification. and apilot stein secured in said head to t Y i in a valve bearing. FRAN K'HOERNER,

